%0 Case Reports
%T A case report of loss of thyroid transcription factor 1 expression in lung adenocarcinoma EBUS FNA.
%A Mathew H
%A Bartle-Jones R
%J Diagn Cytopathol
%V 52
%N 7
%D 2024 Jul 23
%M 38650538
%F 1.39
%R 10.1002/dc.25333
%X We present a case report of a 76-year-old male with a histologically confirmed KRAS mutated, thyroid transcription factor 1 (TTF1) positive, grade 1, mucinous adenocarcinoma with cytologically difficult to interpret lymph node metastasis showing loss of TTF1 expression and overlapping features with goblet cell hyperplasia. The case highlights the importance of molecular testing in aiding diagnosis and guiding treatment of non-small cell lung carcinomas (NSCLC).